Add show option to wxncview
 BSE changes: Replace "average" with qpoint is None test, use KpointList instead of ndarray for the qpoints.
 Rename mdf_select --> mdf_type
 Improved version of mdfviewer.
 Final version of mdfviewer
 Add options to abirun.py gui to perform chroot (useful if we use sshfs)
 "abirun.py DIRPATH new_manager mymanager.yml" to change the manager at run-time.
 Code cleanup